text: // Copyright 2013 the V8 project authors. All rights reserved.
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  //       copyright notice, this list of conditions and the following
  //       disclaimer in the documentation and/or other materials provided
  //       with the distribution.
  //     * Neither the name of Google Inc. nor the names of its
  //       contributors may be used to endorse or promote products derived
  //       from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  // Flags: --allow-natives-syntax
  
  // stubbed version of ToNumber
  function ToNumber(x) {
    return 311;
  }
  
  // Reduced version of String.fromCharCode;
  // does not actually do the same calculation but exhibits untagging bug.
  function StringFromCharCode(code) {
    var n = %_ArgumentsLength();
    var one_byte = %NewString(n, true);
    var i;
    for (i = 0; i < n; i++) {
      var code = %_Arguments(i);
      if (!%_IsSmi(code)) code = ToNumber(code) & 0xffff;
      if (code > 0xff) break;
    }
  
    var two_byte = %NewString(n - i, false);
    for (var j = 0; i < n; i++, j++) {
      var code = %_Arguments(i);
      %_TwoByteSeqStringSetChar(two_byte, j, code);
    }
    return one_byte + two_byte;
  }
  
  StringFromCharCode(0xFFF, 0xFFF);
  StringFromCharCode(0x7C, 0x7C);
  %OptimizeFunctionOnNextCall(StringFromCharCode);
  StringFromCharCode(0x7C, 0x7C);
  StringFromCharCode(0xFFF, 0xFFF);
  
  